Boiler-furnace.



E. H. MGNTGOMERY.

l BOILER FUBNAGE. APPLIOATION FILED APB.. 22. 1908.

936,651. Patnted 0@t.12,.19o9.

2 SHEETS-SHEET 1.

IIIIIIIIIII 7 IIIIIIIIIII 7 IIIIIIIIIII 4 E. H. MONTGOMERY.

Boum rammen. APPLICATION FILED APB. 22, 1,908.

Patented Oct. 12,1909.

PATENT OFFICE.

EDWIN I-I. MONTGOMERY,

0F DULUTH, MINNESOTA.

BOILER-FURNACE.

Specification of Letters Patent.

Patented Oct. 12, 1909.

Application filed April 22, 1908. Serial No. 428,648.

To all whom it may concern:

Be it known. that I, EDWIN H. MONTGOM- ERY, a citizen of the UnitedStates, residing at Duluth, in the county of St. Louis and State ofMinnesota, have invented certain new and useful Improvements in Boiler-Furnaces, of which the following is a speciiication.

My invention relates to improvements in boiler furnaces its object beingto provide improved means for consuming smoke and gases generated fromthe freshly supplied fuel and conserving and making more effective theheat from such smoke and gases.

To this end my features of construction and combination hereinafterparticularly described and claimed.

In the accompanying drawings, Figure l is a vertical longitudinalsection of the furnace, Fig. 2 is a section on line mof Fig. l, Fig. 3is a front elevation of the super-heating baffles, and Fig. 4 is aperspective view of the super-heating baffles partly broken away.

In the drawings 2 represents the front wall, 3 the rear wall, 4 thebridge wall, and 5 the side walls of a boiler furnace. Between the sidewalls is supported in any appropriate manner a boiler 6.

At the rear of the bridge wall is Iny improved construction ofsuper-'heating baffles consisting of a plurality of parallellongitudinally extending walls 7 formed with transverse openings 8.Supported upon the front ends of the walls 7 is an arch 9 carrying atransverse wall l0 encircling the boiler and constituting a deflectingor secondary back wall for the smoke and gases passing over the bridgewall.

In operation the smoke and gases passing over the bridge wall will bestopped and deflected downward by the wall l0 causing them to 'passthrough the openwork heat balies 7. The arrangement and openworkconstruction of the walls 7 impede the passage of the smoke and gasescausing them to become thoroughly super-heated and consuming the smoke.

The perforated baffle walls being kept at a white heat and thoroughlyconsuming the gases cause the least possible expansion and contractionof the boiler thereby prolonging invention consists in the,

Vits life. In the ordinary construction the contact of the incoming coldair with the hot tubes in cleaning the Jires causes loosening andleakage of the tubes at the back end of the boiler which is prevented inmy construction by the heated baffle walls.

I claim:

l. In a furnace of the class described, the combination with side walls,a bridge wall and a boiler supported between the side walls, of aplurality of independent longitudinally extending openwork superheatingwalls arranged at the rear of said bridge wall the lower ends of saidsuperheating walls being substantially on a level with the bottom ofsaid bridge wall and said walls being separated to form intermediateunobstructed passages for smoke and gases, and a transverse divisionwall supported upon the front ends of said superheating walls andencircling said boiler for the purpose set forth.

2. In a steam boiler furnace, the combination of a fire-box, abridge-wall, and a plurality of parallel heat absorbing and retainingwalls in the rear of said bridge-wall and spaced therefrom, saidparallel walls being spaced from one another and from the sides of thefurnace, forming unobstructed longitudinal passages for the products ofcombustion, and each provided with a plurality of transverse openings.

3. In a steam boiler furnace, the combination of a boiler, a lire-box, abridge-wall, anda plurality of parallel heat absorbing and retainingwalls in the rear of said bridge-wall and spaced therefrom, saidparallel walls being spaced from one another and from the sides of thefurnace, forming unobstructed longitudinal passages for the products ofcombustion, and each provided with a plurality of transverse openings,an arch extending from the under surface of the boiler downward andadapted to cause the products of combustion after passing over thebridge-wall to be directed downward into said passages.

In testimony whereof I affix my signature in presence of two witnesses.

EDWIN H. MONTGOMERY.

Witnesses:

I-I. H. -I-Ior'r, ALEX MoDoNALD.

